This event recently concluded.
See http://www.disti.com/SGSC/ for the results.
The winner was Burn Center. Burn Center is a fast-paced, medically-accurate simulation of mass-scale casualty burn treatment. Burn Center was developed to help lead the growing trend for electronic recreation of medical procedures and tactics, making the precious understanding of life-saving techniques both attainable and memorable. An advanced step forward into the future of medical training, Burn Center not only provides the immersive (and much-needed) experience of a full-scale, chaotic triage situation, but it also features an extensive resuscitation mode that follows patients over the course of 36 hours of treatment on an intensive care unit following a disaster event.
Burn Center was developed by 360Ed, a company that specializes in educational games. It's not clear how to get access to the game on the site. :( I've written to the company to ask for access. Once I have that, I'll take a look and get back here with another post.